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	Index: head/sys/geom/cache/g_cache.c
	===================================================================
	--- head/sys/geom/cache/g_cache.c
	+++ head/sys/geom/cache/g_cache.c
	@@ -757,19 +757,9 @@
	/* This field is not important here. */
	md.md_provsize = 0;

	- name = gctl_get_asciiparam(req, "arg1");
	- if (name == NULL) {
	- gctl_error(req, "No 'arg1' argument");
	+ pp = gctl_get_provider(req, "arg1");
	+ if (pp == NULL)
	return;
	- }
	- if (strncmp(name, _PATH_DEV, strlen(_PATH_DEV)) == 0)
	- name += strlen(_PATH_DEV);
	- pp = g_provider_by_name(name);
	- if (pp == NULL) {
	- G_CACHE_DEBUG(1, "Provider %s is invalid.", name);
	- gctl_error(req, "Provider %s is invalid.", name);
	- return;
	- }
	gp = g_cache_create(mp, pp, &md, G_CACHE_TYPE_MANUAL);
	if (gp == NULL) {
	gctl_error(req, "Can't create %s.", md.md_name);
	Index: head/sys/geom/concat/g_concat.c
	===================================================================
	--- head/sys/geom/concat/g_concat.c
	+++ head/sys/geom/concat/g_concat.c
	@@ -840,19 +840,9 @@
	/* Check all providers are valid */
	for (no = 1; no < *nargs; no++) {
	snprintf(param, sizeof(param), "arg%u", no);
	- name = gctl_get_asciiparam(req, param);
	- if (name == NULL) {
	- gctl_error(req, "No 'arg%u' argument.", no);
	+ pp = gctl_get_provider(req, param);
	+ if (pp == NULL)
	return;
	- }
	- if (strncmp(name, _PATH_DEV, strlen(_PATH_DEV)) == 0)
	- name += strlen(_PATH_DEV);
	- pp = g_provider_by_name(name);
	- if (pp == NULL) {
	- G_CONCAT_DEBUG(1, "Disk %s is invalid.", name);
	- gctl_error(req, "Disk %s is invalid.", name);
	- return;
	- }
	}

	gp = g_concat_create(mp, &md, G_CONCAT_TYPE_MANUAL);
	@@ -866,15 +856,13 @@
	sbuf_printf(sb, "Can't attach disk(s) to %s:", gp->name);
	for (attached = 0, no = 1; no < *nargs; no++) {
	snprintf(param, sizeof(param), "arg%u", no);
	- name = gctl_get_asciiparam(req, param);
	- if (name == NULL) {
	- gctl_error(req, "No 'arg%d' argument.", no);
	- return;
	+ pp = gctl_get_provider(req, param);
	+ if (pp == NULL) {
	+ name = gctl_get_asciiparam(req, param);
	+ MPASS(name != NULL);
	+ sbuf_printf(sb, " %s", name);
	+ continue;
	}
	- if (strncmp(name, _PATH_DEV, strlen(_PATH_DEV)) == 0)
	- name += strlen(_PATH_DEV);
	- pp = g_provider_by_name(name);
	- KASSERT(pp != NULL, ("Provider %s disappear?!", name));
	if (g_concat_add_disk(sc, pp, no - 1) != 0) {
	G_CONCAT_DEBUG(1, "Disk %u (%s) not attached to %s.",
	no, pp->name, gp->name);
	Index: head/sys/geom/eli/g_eli_ctl.c
	===================================================================
	--- head/sys/geom/eli/g_eli_ctl.c
	+++ head/sys/geom/eli/g_eli_ctl.c
	@@ -58,7 +58,6 @@
	{
	struct g_eli_metadata md;
	struct g_provider *pp;
	- const char *name;
	u_char *key, mkey[G_ELI_DATAIVKEYLEN];
	int nargs, detach, readonly, dryrunp;
	int keysize, error, nkey, dryrun, dummy;
	@@ -115,22 +114,13 @@
	return;
	}

	- name = gctl_get_asciiparam(req, "arg0");
	- if (name == NULL) {
	- gctl_error(req, "No 'arg%u' argument.", 0);
	+ pp = gctl_get_provider(req, "arg0");
	+ if (pp == NULL)
	return;
	- }
	- if (strncmp(name, _PATH_DEV, strlen(_PATH_DEV)) == 0)
	- name += strlen(_PATH_DEV);
	- pp = g_provider_by_name(name);
	- if (pp == NULL) {
	- gctl_error(req, "Provider %s is invalid.", name);
	- return;
	- }
	error = g_eli_read_metadata(mp, pp, &md);
	if (error != 0) {
	gctl_error(req, "Cannot read metadata from %s (error=%d).",
	- name, error);
	+ pp->name, error);
	return;
	}
	if (md.md_keys == 0x00) {
	@@ -368,18 +358,9 @@
	/* Not important here. */
	bzero(md.md_hash, sizeof(md.md_hash));

	- name = gctl_get_asciiparam(req, "arg0");
	- if (name == NULL) {
	- gctl_error(req, "No 'arg%u' argument.", 0);
	+ pp = gctl_get_provider(req, "arg0");
	+ if (pp == NULL)
	return;
	- }
	- if (strncmp(name, _PATH_DEV, strlen(_PATH_DEV)) == 0)
	- name += strlen(_PATH_DEV);
	- pp = g_provider_by_name(name);
	- if (pp == NULL) {
	- gctl_error(req, "Provider %s is invalid.", name);
	- return;
	- }

	sectorsize = gctl_get_paraml(req, "sectorsize", sizeof(*sectorsize));
	if (sectorsize == NULL) {
	Index: head/sys/geom/label/g_label.c
	===================================================================
	--- head/sys/geom/label/g_label.c
	+++ head/sys/geom/label/g_label.c
	@@ -437,19 +437,9 @@
	/*
	* arg1 is the name of provider.
	*/
	- name = gctl_get_asciiparam(req, "arg1");
	- if (name == NULL) {
	- gctl_error(req, "No 'arg%d' argument", 1);
	+ pp = gctl_get_provider(req, "arg1");
	+ if (pp == NULL)
	return;
	- }
	- if (strncmp(name, _PATH_DEV, strlen(_PATH_DEV)) == 0)
	- name += strlen(_PATH_DEV);
	- pp = g_provider_by_name(name);
	- if (pp == NULL) {
	- G_LABEL_DEBUG(1, "Provider %s is invalid.", name);
	- gctl_error(req, "Provider %s is invalid.", name);
	- return;
	- }
	/*
	* arg0 is the label.
	*/
	Index: head/sys/geom/mirror/g_mirror_ctl.c
	===================================================================
	--- head/sys/geom/mirror/g_mirror_ctl.c
	+++ head/sys/geom/mirror/g_mirror_ctl.c
	@@ -441,34 +441,25 @@
	cp = g_new_consumer(gp);
	for (no = 1; no < *nargs; no++) {
	snprintf(param, sizeof(param), "arg%u", no);
	- name = gctl_get_asciiparam(req, param);
	- if (name == NULL) {
	- gctl_error(req, "No 'arg%u' argument.", no);
	+ pp = gctl_get_provider(req, param);
	+ if (pp == NULL) {
	err:
	g_destroy_consumer(cp);
	g_destroy_geom(gp);
	g_topology_unlock();
	return;
	}
	- if (strncmp(name, _PATH_DEV, strlen(_PATH_DEV)) == 0)
	- name += strlen(_PATH_DEV);
	- pp = g_provider_by_name(name);
	- if (pp == NULL) {
	- G_MIRROR_DEBUG(1, "Disk %s is invalid.", name);
	- gctl_error(req, "Disk %s is invalid.", name);
	- goto err;
	- }
	g_attach(cp, pp);
	if (g_access(cp, 1, 0, 0) != 0) {
	- G_MIRROR_DEBUG(1, "Can't open disk %s.", name);
	- gctl_error(req, "Can't open disk %s.", name);
	+ G_MIRROR_DEBUG(1, "Can't open disk %s.", pp->name);
	+ gctl_error(req, "Can't open disk %s.", pp->name);
	err2:
	g_detach(cp);
	goto err;
	}
	if (pp->mediasize == 0 \|\| pp->sectorsize == 0) {
	- G_MIRROR_DEBUG(1, "Disk %s has no media.", name);
	- gctl_error(req, "Disk %s has no media.", name);
	+ G_MIRROR_DEBUG(1, "Disk %s has no media.", pp->name);
	+ gctl_error(req, "Disk %s has no media.", pp->name);
	g_access(cp, -1, 0, 0);
	goto err2;
	}
	@@ -500,12 +491,10 @@
	sbuf_printf(sb, "Can't attach disk(s) to %s:", gp->name);
	for (attached = 0, no = 1; no < *nargs; no++) {
	snprintf(param, sizeof(param), "arg%u", no);
	- name = gctl_get_asciiparam(req, param);
	- if (strncmp(name, _PATH_DEV, strlen(_PATH_DEV)) == 0)
	- name += strlen(_PATH_DEV);
	- pp = g_provider_by_name(name);
	+ pp = gctl_get_provider(req, param);
	if (pp == NULL) {
	- G_MIRROR_DEBUG(1, "Provider %s disappear?!", name);
	+ name = gctl_get_asciiparam(req, param);
	+ MPASS(name != NULL);
	sbuf_printf(sb, " %s", name);
	continue;
	}
	@@ -677,30 +666,21 @@
	g_topology_lock();
	for (i = 1, n = 0; i < (u_int)*nargs; i++) {
	snprintf(param, sizeof(param), "arg%u", i);
	- name = gctl_get_asciiparam(req, param);
	- if (name == NULL) {
	- gctl_error(req, "No 'arg%u' argument.", i);
	+ pp = gctl_get_provider(req, param);
	+ if (pp == NULL)
	continue;
	- }
	- if (g_mirror_find_disk(sc, name) != NULL) {
	- gctl_error(req, "Provider %s already inserted.", name);
	+ if (g_mirror_find_disk(sc, pp->name) != NULL) {
	+ gctl_error(req, "Provider %s already inserted.", pp->name);
	continue;
	}
	- if (strncmp(name, _PATH_DEV, 5) == 0)
	- name += 5;
	- pp = g_provider_by_name(name);
	- if (pp == NULL) {
	- gctl_error(req, "Unknown provider %s.", name);
	- continue;
	- }
	cp = g_new_consumer(sc->sc_geom);
	if (g_attach(cp, pp) != 0) {
	g_destroy_consumer(cp);
	- gctl_error(req, "Cannot attach to provider %s.", name);
	+ gctl_error(req, "Cannot attach to provider %s.", pp->name);
	continue;
	}
	if (g_access(cp, 0, 1, 1) != 0) {
	- gctl_error(req, "Cannot access provider %s.", name);
	+ gctl_error(req, "Cannot access provider %s.", pp->name);
	err:
	g_detach(cp);
	g_destroy_consumer(cp);
	@@ -709,14 +689,14 @@
	mdsize = (sc->sc_type == G_MIRROR_TYPE_AUTOMATIC) ?
	pp->sectorsize : 0;
	if (sc->sc_provider->mediasize > pp->mediasize - mdsize) {
	- gctl_error(req, "Provider %s too small.", name);
	+ gctl_error(req, "Provider %s too small.", pp->name);
	err2:
	g_access(cp, 0, -1, -1);
	goto err;
	}
	if ((sc->sc_provider->sectorsize % pp->sectorsize) != 0) {
	gctl_error(req, "Invalid sectorsize of provider %s.",
	- name);
	+ pp->name);
	goto err2;
	}
	if (sc->sc_type != G_MIRROR_TYPE_AUTOMATIC) {
	@@ -731,7 +711,7 @@
	md.md_dflags \|= G_MIRROR_DISK_FLAG_INACTIVE;
	if (g_mirror_add_disk(sc, pp, &md) != 0) {
	sc->sc_ndisks--;
	- gctl_error(req, "Disk %s not inserted.", name);
	+ gctl_error(req, "Disk %s not inserted.", pp->name);
	}
	g_topology_lock();
	continue;
	Index: head/sys/geom/mountver/g_mountver.c
	===================================================================
	--- head/sys/geom/mountver/g_mountver.c
	+++ head/sys/geom/mountver/g_mountver.c
	@@ -404,7 +404,6 @@
	g_mountver_ctl_create(struct gctl_req req, struct g_class mp)
	{
	struct g_provider *pp;
	- const char *name;
	char param[16];
	int i, *nargs;

	@@ -421,19 +420,9 @@
	}
	for (i = 0; i < *nargs; i++) {
	snprintf(param, sizeof(param), "arg%d", i);
	- name = gctl_get_asciiparam(req, param);
	- if (name == NULL) {
	- gctl_error(req, "No 'arg%d' argument", i);
	+ pp = gctl_get_provider(req, param);
	+ if (pp == NULL)
	return;
	- }
	- if (strncmp(name, _PATH_DEV, strlen(_PATH_DEV)) == 0)
	- name += strlen(_PATH_DEV);
	- pp = g_provider_by_name(name);
	- if (pp == NULL) {
	- G_MOUNTVER_DEBUG(1, "Provider %s is invalid.", name);
	- gctl_error(req, "Provider %s is invalid.", name);
	- return;
	- }
	if (g_mountver_create(req, mp, pp) != 0)
	return;
	}
	Index: head/sys/geom/nop/g_nop.c
	===================================================================
	--- head/sys/geom/nop/g_nop.c
	+++ head/sys/geom/nop/g_nop.c
	@@ -544,7 +544,7 @@
	intmax_t *val, error, rfailprob, wfailprob, count_until_fail, offset,
	secsize, size, stripesize, stripeoffset, delaymsec,
	rdelayprob, wdelayprob;
	- const char name, physpath, *gnopname;
	+ const char physpath, gnopname;
	char param[16];
	int i, *nargs;

	@@ -671,19 +671,9 @@

	for (i = 0; i < *nargs; i++) {
	snprintf(param, sizeof(param), "arg%d", i);
	- name = gctl_get_asciiparam(req, param);
	- if (name == NULL) {
	- gctl_error(req, "No 'arg%d' argument", i);
	+ pp = gctl_get_provider(req, param);
	+ if (pp == NULL)
	return;
	- }
	- if (strncmp(name, _PATH_DEV, strlen(_PATH_DEV)) == 0)
	- name += strlen(_PATH_DEV);
	- pp = g_provider_by_name(name);
	- if (pp == NULL) {
	- G_NOP_DEBUG(1, "Provider %s is invalid.", name);
	- gctl_error(req, "Provider %s is invalid.", name);
	- return;
	- }
	if (g_nop_create(req, mp, pp,
	gnopname,
	error == -1 ? EIO : (int)error,
	@@ -708,7 +698,6 @@
	struct g_provider *pp;
	intmax_t *val, delaymsec, error, rdelayprob, rfailprob, wdelayprob,
	wfailprob, count_until_fail;
	- const char *name;
	char param[16];
	int i, *nargs;

	@@ -782,17 +771,12 @@

	for (i = 0; i < *nargs; i++) {
	snprintf(param, sizeof(param), "arg%d", i);
	- name = gctl_get_asciiparam(req, param);
	- if (name == NULL) {
	- gctl_error(req, "No 'arg%d' argument", i);
	+ pp = gctl_get_provider(req, param);
	+ if (pp == NULL)
	return;
	- }
	- if (strncmp(name, _PATH_DEV, strlen(_PATH_DEV)) == 0)
	- name += strlen(_PATH_DEV);
	- pp = g_provider_by_name(name);
	- if (pp == NULL \|\| pp->geom->class != mp) {
	- G_NOP_DEBUG(1, "Provider %s is invalid.", name);
	- gctl_error(req, "Provider %s is invalid.", name);
	+ if (pp->geom->class != mp) {
	+ G_NOP_DEBUG(1, "Provider %s is invalid.", pp->name);
	+ gctl_error(req, "Provider %s is invalid.", pp->name);
	return;
	}
	sc = pp->geom->softc;
	@@ -879,7 +863,6 @@
	{
	struct g_nop_softc *sc;
	struct g_provider *pp;
	- const char *name;
	char param[16];
	int i, *nargs;

	@@ -897,17 +880,12 @@

	for (i = 0; i < *nargs; i++) {
	snprintf(param, sizeof(param), "arg%d", i);
	- name = gctl_get_asciiparam(req, param);
	- if (name == NULL) {
	- gctl_error(req, "No 'arg%d' argument", i);
	+ pp = gctl_get_provider(req, param);
	+ if (pp == NULL)
	return;
	- }
	- if (strncmp(name, _PATH_DEV, strlen(_PATH_DEV)) == 0)
	- name += strlen(_PATH_DEV);
	- pp = g_provider_by_name(name);
	- if (pp == NULL \|\| pp->geom->class != mp) {
	- G_NOP_DEBUG(1, "Provider %s is invalid.", name);
	- gctl_error(req, "Provider %s is invalid.", name);
	+ if (pp->geom->class != mp) {
	+ G_NOP_DEBUG(1, "Provider %s is invalid.", pp->name);
	+ gctl_error(req, "Provider %s is invalid.", pp->name);
	return;
	}
	sc = pp->geom->softc;
	Index: head/sys/geom/raid3/g_raid3_ctl.c
	===================================================================
	--- head/sys/geom/raid3/g_raid3_ctl.c
	+++ head/sys/geom/raid3/g_raid3_ctl.c
	@@ -422,24 +422,13 @@
	gctl_error(req, "No '%s' argument.", "hardcode");
	return;
	}
	- name = gctl_get_asciiparam(req, "arg1");
	- if (name == NULL) {
	- gctl_error(req, "No 'arg%u' argument.", 1);
	+ pp = gctl_get_provider(req, "arg1");
	+ if (pp == NULL)
	return;
	- }
	if (gctl_get_param(req, "number", NULL) != NULL)
	no = gctl_get_paraml(req, "number", sizeof(*no));
	else
	no = NULL;
	- if (strncmp(name, _PATH_DEV, 5) == 0)
	- name += 5;
	- g_topology_lock();
	- pp = g_provider_by_name(name);
	- if (pp == NULL) {
	- g_topology_unlock();
	- gctl_error(req, "Invalid provider.");
	- return;
	- }
	gp = g_new_geomf(mp, "raid3:insert");
	gp->orphan = g_raid3_ctl_insert_orphan;
	cp = g_new_consumer(gp);
	Index: head/sys/geom/stripe/g_stripe.c
	===================================================================
	--- head/sys/geom/stripe/g_stripe.c
	+++ head/sys/geom/stripe/g_stripe.c
	@@ -1091,19 +1091,9 @@
	/* Check all providers are valid */
	for (no = 1; no < *nargs; no++) {
	snprintf(param, sizeof(param), "arg%u", no);
	- name = gctl_get_asciiparam(req, param);
	- if (name == NULL) {
	- gctl_error(req, "No 'arg%u' argument.", no);
	+ pp = gctl_get_provider(req, param);
	+ if (pp == NULL)
	return;
	- }
	- if (strncmp(name, _PATH_DEV, strlen(_PATH_DEV)) == 0)
	- name += strlen(_PATH_DEV);
	- pp = g_provider_by_name(name);
	- if (pp == NULL) {
	- G_STRIPE_DEBUG(1, "Disk %s is invalid.", name);
	- gctl_error(req, "Disk %s is invalid.", name);
	- return;
	- }
	}

	gp = g_stripe_create(mp, &md, G_STRIPE_TYPE_MANUAL);
	@@ -1117,15 +1107,13 @@
	sbuf_printf(sb, "Can't attach disk(s) to %s:", gp->name);
	for (attached = 0, no = 1; no < *nargs; no++) {
	snprintf(param, sizeof(param), "arg%u", no);
	- name = gctl_get_asciiparam(req, param);
	- if (name == NULL) {
	- gctl_error(req, "No 'arg%u' argument.", no);
	+ pp = gctl_get_provider(req, param);
	+ if (pp == NULL) {
	+ name = gctl_get_asciiparam(req, param);
	+ MPASS(name != NULL);
	+ sbuf_printf(sb, " %s", name);
	continue;
	}
	- if (strncmp(name, _PATH_DEV, strlen(_PATH_DEV)) == 0)
	- name += strlen(_PATH_DEV);
	- pp = g_provider_by_name(name);
	- KASSERT(pp != NULL, ("Provider %s disappear?!", name));
	if (g_stripe_add_disk(sc, pp, no - 1) != 0) {
	G_STRIPE_DEBUG(1, "Disk %u (%s) not attached to %s.",
	no, pp->name, gp->name);
	Index: head/sys/geom/virstor/g_virstor.c
	===================================================================
	--- head/sys/geom/virstor/g_virstor.c
	+++ head/sys/geom/virstor/g_virstor.c
	@@ -313,32 +313,19 @@
	for (i = 1; i < *nargs; i++) {
	struct g_virstor_metadata md;
	char aname[8];
	- const char *prov_name;
	struct g_provider *pp;
	struct g_consumer *cp;
	u_int nc;
	u_int j;

	snprintf(aname, sizeof aname, "arg%d", i);
	- prov_name = gctl_get_asciiparam(req, aname);
	- if (prov_name == NULL) {
	- gctl_error(req, "Error fetching argument '%s'", aname);
	- g_topology_unlock();
	- return;
	- }
	- if (strncmp(prov_name, _PATH_DEV, sizeof(_PATH_DEV) - 1) == 0)
	- prov_name += sizeof(_PATH_DEV) - 1;
	-
	- pp = g_provider_by_name(prov_name);
	+ pp = gctl_get_provider(req, aname);
	if (pp == NULL) {
	/* This is the most common error so be verbose about it */
	if (added != 0) {
	- gctl_error(req, "Invalid provider: '%s' (added"
	- " %u components)", prov_name, added);
	+ gctl_error(req, "Invalid provider. (added"
	+ " %u components)", added);
	update_metadata(sc);
	- } else {
	- gctl_error(req, "Invalid provider: '%s'",
	- prov_name);
	}
	g_topology_unlock();
	return;

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